名校
1 . 如图,在直三棱柱
中,已知
,
分别为
的中点,求证:
![](https://img.xkw.com/dksih/QBM/2016/5/18/1572636302245888/1572636308340736/STEM/e42820684e5f483eac04c8bffa6d736c.png)
(1)平面
平面
;
(2)
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57f47d6a88e962cd790d2f159c021ec1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9369aed2d8309af46ac3eaffb9cce537.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/473ce0e22c4edc6ef768e0c12f59e483.png)
![](https://img.xkw.com/dksih/QBM/2016/5/18/1572636302245888/1572636308340736/STEM/e42820684e5f483eac04c8bffa6d736c.png)
(1)平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ac01b4d05b3a28748f2f8975ec5e11d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cc6184b191e6da43911e701121517e.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54f845e74c18cdb2d6a80e0c0b4e85cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faa23fa14f624ad8212bda55d321362f.png)
您最近一年使用:0次
2016-12-04更新
|
4378次组卷
|
2卷引用:2016届江苏省苏北三市高三最后一次模拟考试数学试卷
解题方法
2 . 如图,四棱锥P﹣ABCD中,PA⊥平面ABCD,底面ABCD为矩形,E,F分别为棱AB,PC的中点
![](https://img.xkw.com/dksih/QBM/2016/1/25/1572464571105280/1572464577224704/STEM/7a679be1-f08b-4775-9b1e-453a5b3a69e7.png?resizew=173)
(1)求证:PE⊥BC;
(2)求证:EF
平面PAD.
![](https://img.xkw.com/dksih/QBM/2016/1/25/1572464571105280/1572464577224704/STEM/7a679be1-f08b-4775-9b1e-453a5b3a69e7.png?resizew=173)
(1)求证:PE⊥BC;
(2)求证:EF
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c8cf209933f202dbac6e66d9137b4fb.png)
您最近一年使用:0次
解题方法
3 . 如图,三棱锥
中,
⊥底面
,
,
,
为
的中点,
为
的中点,点
在
上,且
.
![](https://img.xkw.com/dksih/QBM/2016/1/15/1572437735358464/1572437741314048/STEM/86b747fb97d94f2f9b74cb15f70d645a.png?resizew=132)
(1)求证:
⊥平面
;
(2)求证:
∥平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a3cc9cccfb4c260dac05f4ed57e8c10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a722f046ce210dce133cf61b130c7fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a41ada2c69a8c4ff1c0a9c780d2a08d.png)
![](https://img.xkw.com/dksih/QBM/2016/1/15/1572437735358464/1572437741314048/STEM/86b747fb97d94f2f9b74cb15f70d645a.png?resizew=132)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db54223bb3fc2fe2497213a4d1f94827.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87c0bfeadcf17b2a45896071f07a4a5a.png)
您最近一年使用:0次
10-11高二下·广西桂林·期中
4 . 已知四棱锥
的底面为直角梯形,
,
,
底面
,且
,
是
的中点.
![](https://img.xkw.com/dksih/QBM/2011/5/18/1570207310995456/1570207316164608/STEM/93ec0e71b0af4ba4b7ab266af065e1f0.png?resizew=276)
(1)求证:直线
平面
;
(2)若直线
与平面
所成的角为
,求二面角
的余弦值大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f79863ffcfa63117ca6741b20a48e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c800b6aabdc453e2c7e343061e9c6a78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ddbf74a99e3e4dad846e584fb2159e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://img.xkw.com/dksih/QBM/2011/5/18/1570207310995456/1570207316164608/STEM/93ec0e71b0af4ba4b7ab266af065e1f0.png?resizew=276)
(1)求证:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5865d488a9cf1181016fd2e866177cdd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db54223bb3fc2fe2497213a4d1f94827.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af9955b5aebb73cd84447e8541f901ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e9a8d2e4172812913af13badafa4dbb.png)
您最近一年使用:0次
2011·江西·一模
5 . 已知直角梯形ABCD中,AB∥CD,
,过A作AE⊥CD,垂足为E,G、F分别为AD、CE的中点,现将△ADE沿AE折叠,使得DE⊥EC.
(1)求证:FG∥面BCD;
(2)设四棱锥D﹣ABCE的体积为V,其外接球体积为
,求V:
的值.
![](https://img.xkw.com/dksih/QBM/2011/4/11/1570115166052352/1570115171434496/STEM/2fc384d69ace4062a896c5d703d8e8bd.png?resizew=298)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4133a08eb2a070de58b5344406c10f27.png)
(1)求证:FG∥面BCD;
(2)设四棱锥D﹣ABCE的体积为V,其外接球体积为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6618ee2b75cea58378952b419322d635.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6618ee2b75cea58378952b419322d635.png)
![](https://img.xkw.com/dksih/QBM/2011/4/11/1570115166052352/1570115171434496/STEM/2fc384d69ace4062a896c5d703d8e8bd.png?resizew=298)
您最近一年使用:0次
9-10高三·广东东莞·阶段练习
名校
6 . 已知四边形
为矩形,
,
,
、
分别是线段
、
的中点,
面
.
(Ⅰ)求证:
;
(Ⅱ)设点
在
上,且
面
,试确定点
的位置.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc11331a7b2d2619b40ee6d34c3bd620.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(Ⅰ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fb2fbbce7207d2b2bdd5c5ab61ecd04.png)
(Ⅱ)设点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa169cb28a2d23bf28a931362fa0320b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0901e2f5cefe6468cbbcaa332287d63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://img.xkw.com/dksih/QBM/2010/10/21/1569860235747328/1569860241113088/STEM/018edd86b3b64c19ac5f634b759b8621.png?resizew=152)
您最近一年使用:0次
2016-11-30更新
|
1138次组卷
|
3卷引用:2011届广东省东莞市五校高三第一次联考文科数学卷
12-13高三上·浙江宁波·阶段练习
7 . 如图所示,在等腰梯形
中,
,
,
为
中点.将
沿
折起至
,使得平面
平面
,
分别为
的中点.
(Ⅰ) 求证:
面
;
(Ⅱ) 求二面角
的余弦值.
![](https://img.xkw.com/dksih/QBM/2012/2/11/1570730553032704/null/STEM/4cf4bee26ceb4842bf44e25cd78e41b7.png?resizew=348)
![](https://img.xkw.com/dksih/QBM/2012/2/11/1570730553032704/1570730558537728/STEM/408be444c1bf48639dcdc5a81cd68940.png?resizew=48)
![](https://img.xkw.com/dksih/QBM/2012/2/11/1570730553032704/1570730558537728/STEM/e5266c522f584b5e9ccec5c338da51be.png?resizew=152)
![](https://img.xkw.com/dksih/QBM/2012/2/11/1570730553032704/1570730558537728/STEM/7e99d7969f804740a6f25b8646b5725a.png?resizew=131)
![](https://img.xkw.com/dksih/QBM/2012/2/11/1570730553032704/1570730558537728/STEM/5b7200e383954b0f94209053c36214a7.png?resizew=15)
![](https://img.xkw.com/dksih/QBM/2012/2/11/1570730553032704/1570730558537728/STEM/e61c19b2ca4440498e2e2994c17b4c91.png?resizew=27)
![](https://img.xkw.com/dksih/QBM/2012/2/11/1570730553032704/1570730558537728/STEM/5eca32991b034c40a2293a65fc33ee71.png?resizew=48)
![](https://img.xkw.com/dksih/QBM/2012/2/11/1570730553032704/1570730558537728/STEM/dc1861e7817d49218ad78aa970a9a939.png?resizew=28)
![](https://img.xkw.com/dksih/QBM/2012/2/11/1570730553032704/1570730558537728/STEM/229f79415f7d43b5b3903dd5cb7dc8d0.png?resizew=47)
![](https://img.xkw.com/dksih/QBM/2012/2/11/1570730553032704/1570730558537728/STEM/8bfb2e9c30374127bfe61832730ca072.png?resizew=52)
![](https://img.xkw.com/dksih/QBM/2012/2/11/1570730553032704/1570730558537728/STEM/28c1632a047c4a689b07f0b60caaa395.png?resizew=48)
![](https://img.xkw.com/dksih/QBM/2012/2/11/1570730553032704/1570730558537728/STEM/f8204085d91c4774b927cec0ea493ecb.png?resizew=40)
![](https://img.xkw.com/dksih/QBM/2012/2/11/1570730553032704/1570730558537728/STEM/430dddb51c144110a08b14effb9a8098.png?resizew=53)
(Ⅰ) 求证:
![](https://img.xkw.com/dksih/QBM/2012/2/11/1570730553032704/1570730558537728/STEM/f6c1b2ea56574ce59b418dcab89a10d3.png?resizew=42)
![](https://img.xkw.com/dksih/QBM/2012/2/11/1570730553032704/1570730558537728/STEM/893a3496fe4d470fa92bb5b633654b05.png?resizew=37)
(Ⅱ) 求二面角
![](https://img.xkw.com/dksih/QBM/2012/2/11/1570730553032704/1570730558537728/STEM/a84af7f93ab6465ba39cc413074c1677.png?resizew=81)
![](https://img.xkw.com/dksih/QBM/2012/2/11/1570730553032704/null/STEM/4cf4bee26ceb4842bf44e25cd78e41b7.png?resizew=348)
![](https://img.xkw.com/dksih/QBM/2012/2/11/1570730553032704/1570730558537728/ANSWER/4b18e9ec776048099028b263124f9066.png?resizew=171)
您最近一年使用:0次
12-13高三上·浙江台州·阶段练习
8 . 右图为一简单组合体,其底面ABCD为正方形,
,
且PD=AD=2EC=2,
(1)求证:
平面
;(2)求PA与平面PBD所成角的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d66e834d5a04a5ffc5bbeff424f537.png)
![](https://img.xkw.com/dksih/QBM/2012/1/2/1570671644237824/1570671649726464/STEM/b9da660cdb4a4a8eb20715c3c8290f3a.png?resizew=62)
且PD=AD=2EC=2,
(1)求证:
![](https://img.xkw.com/dksih/QBM/2012/1/2/1570671644237824/1570671649726464/STEM/e18f26f53d8f496eb080615724b0daee.png?resizew=37)
![](https://img.xkw.com/dksih/QBM/2012/1/2/1570671644237824/1570671649726464/STEM/89aa59639c1f4ffb88e59bfd81f215c1.png?resizew=36)
![](https://img.xkw.com/dksih/QBM/2012/1/2/1570671644237824/1570671649726464/STEM/19ba9f251e6f4bd9b1f4c94a3de1e95b.png?resizew=227)
您最近一年使用:0次
解题方法
9 . 如图所示,已知三棱柱
中,若
是棱
的中点,在棱
上是否存在一点
使
平面
?并证明你的结论.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57f47d6a88e962cd790d2f159c021ec1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/063510e3c1fb6a7ccc3b8e3e3c7d660e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07b7903de4be7d5dc1175cfbf6e8da9f.png)
![](https://img.xkw.com/dksih/QBM/2016/11/18/1579005317308416/1579005317939200/STEM/f407eed13de5401bb2963db997db5530.png)
您最近一年使用:0次
2016-12-13更新
|
741次组卷
|
3卷引用:2016-2017学年山西省实验中学高二10月段测数学试卷
2010·广东·一模
解题方法
10 . 如图所示,已知
是直角梯形,
,
,
,
平面
.
![](https://img.xkw.com/dksih/QBM/2010/7/8/1576720418185216/1576720498032640/STEM/3361698e98184a80a83b496a9d30b414.png?resizew=157)
(1)证明:
;
(2)若
是
的中点,证明:
平面
;
(3)若
,求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a2f39d3fcb1664705228e683c2cc3b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f571396be1aa4a8914a66f7d7abd6381.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92574fca921c597d2b2c78fa0c6d34a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/2010/7/8/1576720418185216/1576720498032640/STEM/3361698e98184a80a83b496a9d30b414.png?resizew=157)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8c231fb9aeaf4b73c2d835bb4c3d42b.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7175df06e33cad4e6bbc3f2f6b0a2986.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/491c3a4f72b84ebadd28b90711435adc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b183492677d0457b8701c53d9fa1414.png)
您最近一年使用:0次